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The 303 S offers an entirely new rim profile and design to optimize rider performance on this new breed of bike. This wheelset is tubeless for disc-brake bikes allowing the ability to run wide tires at lower pressures for race-ready speed on or off the pavement. The 303 S is among our lightest wheelsets optimized for top aero performance with a 28mm tire but capable of handling gravel tires up to 50mm wide. The 303 S Series borrows design concepts from the higher-level 303 Firecrest Tubeless Disc-brake wheelset to gain speed through increased efficiency. That is achieved by creating a wheel with reduced: Wind resistance rolling resistance rider fatigue and weight. The key innovation is in the 303 S Series’rim design. Its 45mm rim depth is the same as its predecessor the 302 Disc brake. But its rim width is 2mm wider at 27mm and its tire bed is a full 7mm wider at 23mm. That rim platform is designed to be the fastest with a 28mm tire. The wide rim optimizes t.
- Zipp graphics and cosmetic identity that scream speed
- Fastest with 28mm fits wide gravel tires as well
- Lower tire pressures and larger volume provides a compliant ride with fewer vibrations
- Significant watt savings when running larger tires at lower pressure
- Wide hookless rims create a seamless transition to the tire reducing drag
- 76 / 176 DB hubs with center locking interface
- XDR driver body option
- Lock ring included